/// <summary>
/// 數(shù)量控件
/// </summary>
//下面代碼可使控件顯示在工具箱中。
[System.ComponentModel.ToolboxItem(true), System.ComponentModel.ToolboxItemFilter("Smobiler.Core.Controls")]
//取名，繼承MobileLayoutControl布局控件、IMobileBindableControl數(shù)據(jù)綁定控件接口
public class Numeric : MobileLayoutControl, IMobileBindableControl
{   }

    //Numeric中間的輸入框
    private TextBox txtValue;
    //Numeric左邊的減少的圖標(biāo)
    private FontIcon fontMinus;
    //Numeric右邊的增加的圖標(biāo)
    private FontIcon fontPlus;
    //使左邊圖標(biāo)可點擊
    private Panel Minus;
    //使右邊圖標(biāo)可點擊
    private Panel Plus;

    /// <summary>
    /// 初始化Numeric類的一個新實例
    /// </summary>
    public Numeric()
    {
        //本界面使用相對布局的方式，可按照自己順手方式。
        this.Layout = LayoutPosition.Relative;
        //最外層添加一個Panel裝所有的控件。
        Panel NPanel = new Panel();
        NPanel.Layout = LayoutPosition.Relative;
        //numeric需要橫向排列設(shè)置容器主軸方向為Row。
        NPanel.Direction = LayoutDirection.Row;
        //在相對布局下使用Flex屬性撐滿界面
        NPanel.Flex = 1;
        NPanel.Width = 0;

        //設(shè)計左邊可點擊的Panel樣式
        Minus = new Panel();
        Minus.Touchable = true;
        Minus.Layout = LayoutPosition.Relative;
        Minus.Flex = 1;
        Minus.Height = 0;
        Minus.Padding = new Padding(5, 0, 0, 0);
         Minus.BackColor = System.Drawing.Color.Transparent;

       //設(shè)計左邊的減少的圖標(biāo)的樣式
       fontMinus = new FontIcon
        {
            FontName = FontIconName.FontAwesome,
            ResourceID = "minus-circle",
            ForeColor = System.Drawing.Color.DarkGray,
            Width = 0,
            Flex = 1
        };
       //設(shè)計完樣式之后把圖標(biāo)放入Panel容器中，即右邊點擊圖標(biāo)部分即完成了。
       Minus.Controls.Add(fontMinus);

     //以同樣的方式設(shè)計右邊的點擊圖標(biāo)。
     .......
     .......
     Plus.Controls.Add(fontPlus);

     //設(shè)計中間的TextBox的樣式。
     txtValue = new TextBox();
     txtValue.Text = mValue.ToString();
     //相對布局中設(shè)置txtValue的Flex為3，則對比Minus與Plus的1，表示txtValue為同一容器中大小占據(jù)3的份額，Minus與Plus個占據(jù)1.
     txtValue.Flex = 3;
     txtValue.Height = 0;
     txtValue.FontSize = 18;
     txtValue.KeyboardType = KeyboardType.Numeric;
     txtValue.HorizontalAlignment = HorizontalAlignment.Center;
     txtValue.BackColor = System.Drawing.Color.Transparent;

     //所有的樣式都設(shè)計完了，這時就可以組合在一起了。
     NPanel.Controls.AddRange(new MobileControl[] { Minus, txtValue, Plus });
        //自定義控件需要添加在SmobilerUserControl。
        var mControls = new MobileControlCollection();
        //注冊控件的集合
        base.RegisterControls(mControls);
        mControls.Add(NPanel);
    }

        Minus.Press += (obj, args) =>
        {
            if (string.IsNullOrEmpty(txtValue.Text.Trim()) == false)
            {
                decimal inputValue = 0;
                if (decimal.TryParse(txtValue.Text, out inputValue) == true)
                {
                    Value = inputValue - Variation;
                    initValue = Value;
                }
                else
                {
                    Value = Value;
                }
            }
            else{
                Value = mMinValue;
            }
        };

 txtValue.TextChanged += (obj, args) =>
        {
         ......
        };
 txtValue.TouchEnter += (obj, args) =>
        {
         ......  
        };
        txtValue.TouchLeave += (obj, args) =>
        {
         ......    
        };

    private decimal mValue = 0;
    /// <summary>
    /// 設(shè)置控件顯示的默認(rèn)值
    /// </summary>
    [Browsable(true), Category("Behavior"), DefaultValue(typeof(decimal), "0"), Description("顯示默認(rèn)值")]
    public decimal Value
    {
        get
        {
            return mValue;
        }
        set
        {
            //添加判斷
            value = (decimal)Math.Round(value, mDecimals);

            if (this.Parent != null && this.Parent.Controls.Contains(this) == true && (value > mMaxValue))
                value = MaxValue;
            else if (this.Parent != null && this.Parent.Controls.Contains(this) == true && (value < mMinValue))
                value = MinValue;
            if (initValue==value)
            {
                TextChanged = false;
                mValue = value;
            }
           else if (mValue != value||TextChanged==true)
            {
                TextChanged = false;
                mValue = value;
                //if (ValueChanged != null)
                //ValueChanged.Invoke(this, new EventArgs());
            }
            //給txtValue賦值顯示。
            txtValue.Text = mValue.ToString("f" + Decimals);
        }
    }

    /// <summary>
    /// 使控件獲取焦點。
    /// </summary>
    public void Focus()
    {
        txtValue.Focus();
    }
    /// <summary>
    /// 使控件失去焦點。
    /// </summary>
    public void Blur()
    {
        txtValue.Blur();
    }

    private string mDisplayMember = "";
    /// <summary>
    /// 獲取和設(shè)置顯示綁定字段。
    /// </summary>
    [Browsable(true), Category("Data"), Description("顯示綁定字段"), DefaultValue("")]
    public string DisplayMember { get { return mDisplayMember; } set { mDisplayMember = value; } }
     .......
   [Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
    public object BindDisplayValue
    {
        get
        {
            return Value;
        }
        set
        {
            if (value != null)
            {
                this.Value = decimal.Parse(value.ToString());
            }
        }
    }

    /// <summary>
    /// 值改變時發(fā)生
    /// </summary>
    [Description("值改變時發(fā)生")]
    public event EventHandler ValueChanged;

 if (ValueChanged != null) ValueChanged.Invoke(this, new EventArgs());